共查询到20条相似文献，搜索用时 78 毫秒
1.
Ankila J. Hiremath 《Resonance》2018,23(3):325-335
Invasive alien species are a growing conservation problem, worldwide. There are over 200 invasive plants in India, of which Lantana camara is one of the best known. This article looks at a brief history of Lantana’s arrival and spread across the Indian subcontinent and the lessons that conservation biologists can learn from it. 相似文献
2.
生物多样性丧失原因及保护对策 总被引：3，自引：0，他引：3
珍稀濒危物种的保护是生物多样性保护的一个重要内容，长期进化过程和人类活动影响是生物多样性丧失的两个原因。建立自然保护区是保护生物多样性的最有效途径，对珍稀濒危物种而言迁地保护是主要措施之一，就地保护和迁地保护结合使生物多样性保护更加有效。 相似文献
3.
物种濒危机制是保护生物学所要解决的核心问题之一。简要介绍了植物保护中的一些基本概念，分析讨论了遗传力、生殖力、生活力、适应力的衰竭、人类直接干扰破坏、气候变迁、生境丧失、过度利用、物种入侵以及分类学家的局限等导致物种濒危的濒危机制。提出了就地保护、迁地保护、建立现代化离体保存基因库、加强珍稀濒危植物的繁殖和归化自然以及加强对珍稀濒危植物和野生植物资源的科学研究等保护对策。 相似文献
4.
Kartik Shanker 《Resonance》2002,7(6):53-66
Marine turtles are known to migrate several thousands of kilometres between their feeding and breeding grounds. These migrations have been studied by the application of metal tags on flippers, with intense monitoring at nesting sites, and opportunistic recovery in offshore waters, providing information on turtle movements. Often, several thousands of tags have been applied with very low levels of recapture. Satellite telemetry is a high-tech, and expensive, method to track turtles during their migration across the open ocean. Molecular genetic techniques have offered ways to track turtles both through space and time. The comparison of genetic haplotypes from different regions makes it possible to study population structure, test theories of natal homing, and even assign feeding populations to nesting sites and vice versa. The study of these haplotypes has also made it possible to look at relationships between species and populations, and study evolutionary biogeography or phylogeography of these animals. 相似文献
5.
In the early 1990s, large numbers of children in India remained out of school. International commitments to achieve education for all (EFA) globally meant that India was an important case for donors. India was pressed to accept aid for primary education, and agreed with some reluctance. Although subsequent donor involvement was substantial and influenced aspects of both policy implementation and management, it is shown that Indian education policy priorities remained self-determined. The Government of India – though falling short of securing universal education for its children – succeeded in using external resources and expertise in ways which suited its own purposes, whilst minimising external impact on policy development. The politics and economics of this process are discussed. 相似文献
6.
M. D. Subash Chandran 《Resonance》1996,1(11):69-75
A beautiful monocarpic palm of the Western Ghats, talipot which through the ages played a silent role in the culture, economy and ecology especially of the west coast of South India, is facing an uncertain future mainly due to negligence. Much could be done to bring back this palm from obscurity into the mainstream of conservation. 相似文献
7.
现代电力电子技术的发展及其应用 总被引：1，自引：0，他引：1
刘莉宏 《北京工业职业技术学院学报》2006,5(3):1-4,7
当前,电力电子技术作为节能、节材、自动化、智能化、机电一体化的基础,正朝着应用技术高频化、硬件结构模块化、控制技术数字化、产品性能绿色化的方向发展.本文浅析了电力电子技术的构成、发展和应用.分析和认识现代电力电子技术的发展及其应用对进一步应用和研究电力电子技术具有十分重要的指导意义. 相似文献
8.
报道了泉州市药用爬行动物的种类及其用途，经整理鉴定，泉州药用爬行动物隶属于2目9科17属25种，其中，有3种属于国家重点保护野生动物，2种属于国家重点保护野生药材，20种为国家保护的，有益的或有重要经济、科学研究价值的陆生野生动物。 相似文献
9.
中国古塔由印度传入,形成于东汉,繁荣于唐宋。古塔的加固技术主要有复位纠偏和加固补强。太原市双塔东塔纠偏采用的是直接掏土纠偏法。江苏苏州虎丘塔塔基的加固采用的是建造桩排式地下连续墙和压力灌浆相结合的方法。古塔日常保养与维护的主要措施有:进行定期的科学观测、做好经常性的保养维护工作和做好古塔周围的防水工作。 相似文献
10.
Jakob Williams Ørberg 《Higher Education》2018,76(1):129-144
India’s elite sector of engineering universities, Indian Institutes of Technology (IITs), are seen as safe gateways to a life in the politically hyped “new India” of the global knowledge economy. The Indian entrance exam coaching industry each year enrolls hundreds of thousands of students in classes strictly directed at “cracking” the institutes’ famous Joint Entrance Examination (JEE). Vast majorities of students at IITs are by now former coaching students, and coaching is increasingly supplanting performance in secondary education as the perceived prerequisite for IIT admission. This poses serious questions about the ability of the institutions to autonomously steer student selection and recruit the select exceptional students whom until now have kept “IITians” in the center of imaginaries of India’s future. This article explores the case of residential pre-entrance exam coaching to assess the coaching sector’s role in shaping India’s future technological leaders. It assesses the educational structure of the sector, its effect on student lives, the life aspirations it relies on, and how it is shaping IIT education itself. The case of entrance exam coaching in India, it is argued, prompt a reassessment of the concept of “shadow education” in order to begin a more thorough research agenda focused on the educational production and policy consequences of this “shadow” industry as an integrated (even if unwanted) and co-constitutive part of the higher education sector. 相似文献
11.
Madhav Gadgil 《Resonance》1997,2(6):79-85
In a diverse country like India first hand observations of diversity of life forms could provide an interesting focus and
purpose to the teaching of biology. In the process it could generate information of great relevance to monitor biodiversity
in order to assess the efficacy of our conservation efforts. The endeavour of organizing such observations into a countrywide
biodiversity information system could help catalyze our transition to the information age. 相似文献
12.
This article explores the connections between official contemporary identity formation and colonial pasts. Using the case studies of India and Ireland the article explores how different traditions of theorisation are powerful in these formations. India and Ireland were two colonial domains that had many linkages outside the ambit of the British. These linkages are made sense of using methodological approaches like those deployed by Dick Selleck and Geoff Sherington in key works. Yet the colonial stories of these two countries are also distinctive, offering up strong trajectories that inform different contemporary controversies from uncomfortable yet stereotyped perspectives. 相似文献
13.
In conservation problems, it is commonly assumed that equivalence judgments are not facilitated by observation of the stimuli following transformation. The reverse is usually assumed to be the case. These assumptions were tested in a training experiment. Perceptual counterparts of a series of conservation of length tests were presented to subjects who were catagorized as conservers or nonconservers on conservations of length pretests, and to conservers and nonconservers given conservation of length training. Perceptual performance of the untrained nonconservers was significantly worse than that of the other 3 groups, that is, trained nonconservers, untrained conservers, and trained conservers. These findings are interpreted as consistent with the hypothesis that conservation is attained with the support of perception, not in spite of it. 相似文献
14.
Molecular modeling has become a valuable and essential tool to medicinal chemists in the drug design process. Molecular modeling
describes the generation, manipulation or representation of three-dimensional structures of molecules and associated physico-chemical
properties. It involves a range of computerized techniques based on theoretical chemistry methods and experimental data to
predict molecular and biological properties. Depending on the context and the rigor, the subject is often referred to as ‘molecular
graphics’, ‘molecular visualizations’, ‘computational chemistry’, or ‘computational quantum chemistry’. The molecular modeling
techniques are derived from the concepts of molecular orbitals of Hückel, Mullikan and ‘classical mechanical programs’ of
Westheimer, Wiberg and Boyd. 相似文献
15.
泉州市药用两栖动物资源 总被引：6，自引：0，他引：6
谢进金 《泉州师范学院学报》2003,21(6):81-84
报道了泉州市药用两栖动物的种类及其用途，经整理鉴定，泉州药用两栖动物隶属于5科6属16种，其中，有1种属于国家重点保护野生动物；2种属于国家重点保护野生药材；12种为国家保护的有益的或有重要经济、科学研究价值的陆生野生动物，章的研究将对泉州市的药用两栖动物资源开发与保护提供参考。 相似文献
16.
卧龙是四川省珍稀濒危植物最丰富的地区.有国家保护的珍稀濒危植物24种,隶属18种20属,其中一级保护2种,二级保护11种,三级保护11种,该文论述了该地区珍稀濒危植物的特点、类型及地理分布,列举了这些植物的一些利用价值,及保护建议. 相似文献
17.
In this study, we aimed to understand experience of students about transition from lecture mode to case study pedagogy in business management courses. Indian education system is predominantly a follower of the lecture mode of teaching from the grass-root level till graduation. Hence Indian students are relatively less familiar with the case based teaching method. In recent times, the case pedagogy has been rapidly replacing the lecture mode in higher education institutes of India, especially at the business management colleges. We conducted a grounded theory based interview of 33 post graduate students enrolled in a business school (B School) in India, which incorporated a pedagogy shift from lecture to case method during academic session 2010–2011. We found that some of the major factors which facilitated the transition process of the students to this new style of learning were previous educational background, prior work experience, course evaluation methods, institute policies and proper orientation through preparatory sessions. Our findings substantiated extant studies conducted in the context of western countries. The findings also provide a systematic analysis of the various issues in incorporating such pedagogic shifts, which may help academicians to successfully troubleshoot any problems associated with commencement of case based teaching in the Indian context. 相似文献
18.
狄承锋 《北京师范大学学报(社会科学版)》2004,(1):90-95
印度作为低收入的发展中大国,从理论上讲应该立足于国内市场,发展劳动密集型产业。然而印度却在近年内迅速走到了世界计算机软件产业的前列。从产业特点来看,飞速发展的印度软件业是出口导向的产业,也是人力资本密集的产业。这表明印度既抓住了国际市场上发达国家软件及服务需求不断扩大的机遇,又充分利用人口大国丰富而低廉的人力资源优势,因而能在发达国家主导的知识密集型产业领域占据有利地位。这为发展中国家如何在知识经济时代利用本国的比较优势促进经济发展提供了有益的启示。 相似文献
19.
Griffin AS 《Learning & behavior》2004,32(1):131-140
In comparison with social learning about food, social learning about predators has received little attention. Yet such research is of potential interest to students of animal cognition and conservation biologists. I summarize evidence for social learning about predators by fish, birds, eutherian mammals, and marsupials. I consider the proposal that this phenomenon is a case of S-S classical conditioning and suggest that evolution may have modified some of the properties of learning to accommodate for the requirements of learning socially about danger. I discuss some between-species differences in the properties of socially acquired predator avoidance and suggest that learning may be faster and more robust in species in which alarm behavior reliably predicts high predatory threat. Finally, I highlight how studies of socially acquired predator avoidance can inform the design of prerelease antipredator training programs for endangered species. 相似文献
20.
Hammer N Löffler S Feja C Sandrock M Schmidt W Bechmann I Steinke H 《Anatomical sciences education》2012,5(4):225-233
Anatomical fixation and conservation are required to prevent specimens from undergoing autolysis and decomposition. While fixation is the primary arrest of the structures responsible for autolysis and decomposition, conservation preserves the state of fixation. Although commonly used, formaldehyde has been classified as carcinogenic to humans. For this reason, an adequate substitute was developed. Ethanol-glycerin fixation and thymol conservation are described and compared with formaldehyde and phenol in this technical report. The setup, tissue qualities, financial aspects, and health concerns of this method are discussed. Ethanol-glycerin fixation and thymol conservation provide outstanding haptic and optic tissue qualities. Typical formaldehyde and phenol effects, such as skin, airway, and eye irritation, as well as carcinogenic effects, can be circumvented by using ethanol-glycerin and thymol instead. Ethanol-glycerin fixation is more expensive than formaldehyde and requires an explosion-proof facility. However, the absence of health effects and its convincing tissue qualities balance these higher costs. Therefore, ethanol-glycerin fixation and thymol conservation provide a potential alternative and complement established fixation techniques. The use of carcinogenic formaldehyde and toxic phenol can be effectively restricted through the use of the described method. 相似文献